Pooled Analysis of S-1 Trials in Non-Small Cell Lung Cancer According to Histological Type+ n- Z7 _3 x8 V8 L
NOBUYUKI YAMAMOTO1, TAKEHARU YAMANAKA2, YUKITO ICHINOSE3, KAORU KUBOTA4, HIROSHI SAKAI5, AKIHIKO GEMMA6, NAGAHIRO SAIJO7, MASAHIRO FUKUOKA8 and HISANOBU NIITANI9
$ X/ N7 p) _! i H* Y8 Y+ Author Affiliations2 [* F. l( ?6 G. ?
. ]' l& |" O! z B. e0 @1Division of Thoracic Oncology, Shizuoka Cancer Center, Shizuoka 411-8777, Japan
9 k _+ I8 U/ O6 Z- k g: L! ^2 d* ?2Cancer Biostatistics Laboratory, Institute for Clinical Research, National Kyushu Cancer Center, Fukuoka 811-1395, Japan ' N: u& t5 f- Y
3Department of Thoracic Oncology, National Kyushu Cancer Center, Fukuoka 811-1395, Japan
6 p9 c, i' V' V6 B! r4 e4Division of Thoracic Oncology, National Cancer Center Hospital, Tokyo 104-0045, Japan
, m9 W/ s2 e$ V4 T; M6 R. }7 S/ n5Division of Thoracic Oncology, Saitama Cancer Center, Saitama 362-0806, Japan ! S- ^% _; Y! t3 R$ M G
6Division of Pulmonary Medicine, Infectious Diseases, and Oncology Department of Internal Medicine, Nippon Medical School, Tokyo 113-8603, Japan ' }) [8 ], e; i0 F4 y7 S. a/ l
7Kinki University School of Medicine, Osaka 589-8511, Japan
0 h6 H4 n# s& B7 Y4 g8Izumi Municipal Hospital, Osaka 594-0071, Japan
" ?; J- J5 L' ^8 a9Tokyo Cooperative Oncology Group, Tokyo 105-0013, Japan : r; Z9 H) M @& H* y* {
Correspondence to: Nobuyuki Yamamoto, Division of Thoracic Oncology, Shizuoka Cancer Center, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan. Tel: +81 559895222, Fax: +81 559895783, e-mail: n.yamamoto@scchr.jp $ Z$ O0 H' e4 o' K' v
AbstractBackground: The antimetabolic agent S-1 inhibits thymidylate synthase similar to pemetrexed, but through a different mechanism of action. Whether the antitumour activity of S-1 depends on histological type remains unclear. We analysed pooled data from 2 phase II clinical studies of cisplatin and S-1 in patients with previously untreated advanced non-small cell lung cancer. Patients and Methods: We comprised 110 patients with stage IIIB or IV non–small cell lung cancer. Univariate and multivariate analyses were performed to determine the effects of histological type on progression-free survival and response rates. Results: On pooled analysis of the data, according to histological type, median progression-free survival was 3.8 months in patients with squamous cell carcinoma and 4.4 months in those with non-squamous cell carcinoma. Both analyses showed that progression-free survival and response rate did not differ significantly. Conclusion: Unlike molecular targeted agents and pemetrexed, a combination of cisplatin and S-1 may be no difference in response according to histological type. ' [ c1 P9 _9 r
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